President Donald Trump's plan to have two top security advisers could impede the overall picture of terrorist threats to the United States, former federal prosecutor Andrew McCarthy tells Newsmax TV.

"The big mistake I think we made in the '90s — and you remember this prior to 9/11 — [were] the impediments to the sharing of intelligence.... No one could get a complete picture of the enemy that we were dealing with," McCarthy said Tuesday to Steve Malzberg on "America Talks Live."

"A lot of what's coming out of the Trump administration on national security is good and welcome, but one thing I read that gives me some pause is this idea of having the president have two advisers, one basically for domestic homeland security purposes related to terrorism and another related to international terrorism.

"The terrorist threat and the broader threat of radical Islam does not recognize national boundaries in terms of the way it threatens us. So what goes on outside our borders actually leverages the atmosphere of intimidation, the call for more attacks, causes more terrorism here and vice versa."

To make the most out of national intelligence on terrorism, walls between agencies should be ended information shared, said McCarthy, who served as an assistant U.S. Attorney for the Southern District of New York and prosecuted the terrorists involved in the 1993 attack on New York's World Trade Center.